首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   148篇
  免费   15篇
  2024年   2篇
  2023年   3篇
  2020年   4篇
  2019年   4篇
  2018年   9篇
  2017年   18篇
  2016年   10篇
  2015年   9篇
  2014年   10篇
  2013年   27篇
  2012年   3篇
  2011年   4篇
  2010年   5篇
  2009年   1篇
  2007年   5篇
  2006年   4篇
  2005年   5篇
  2004年   3篇
  2003年   5篇
  2002年   2篇
  2000年   1篇
  1998年   1篇
  1997年   1篇
  1996年   1篇
  1995年   1篇
  1994年   5篇
  1993年   2篇
  1992年   4篇
  1991年   2篇
  1990年   2篇
  1989年   1篇
  1987年   1篇
  1983年   1篇
  1979年   1篇
  1978年   1篇
  1977年   3篇
  1975年   1篇
  1974年   1篇
排序方式: 共有163条查询结果,搜索用时 31 毫秒
101.
This article re-examines the political thought of the neglected Fabian essayist and radical journalist William Clarke. Historians have differed over the relative importance of socialism and liberalism in Clarke's political thought. The argument is made here that the key to Clarke's thought lies in his moralised conception of democracy, rooted in his monist ontology. The further deepening of democracy was threatened for Clarke by developments in monopolistic capitalism and the related emergence of a new imperialism. Clarke's understanding of democracy, rather than more overtly economic considerations, lies at the heart of his political religion, and links his views on domestic and foreign affairs. As befits a philosophical monist, his political thought reveals the limitations of established dichotomies for grasping the character of progressivism in late nineteenth and early twentieth century Britain.  相似文献   
102.
103.
This paper presents research into the identification of tobacco residues in ancient smoking pipes. Two techniques have been used so far: gas chromatography/mass spectroscopy (GC/MS), and Raman microscopy. GC/MS has been used successful in the past by the author to identify ancient tobacco residues, and the results of this round of analysis support prior research. Raman microscopy, which has the advantage of working on dry samples without solvents, was not successful. It appears that combustion products overwhelm any useful signal that would identify the substance smoked. We are pursuing the use of Raman in non-combusted samples.  相似文献   
104.
The design of a projectile delivery system often plays a critical role in the durability and breakage patterns associated with spent projectile points. This paper presents the results of an experimental project designed to examine projectile point durability and breakage patterns between three different hafting methods. Specifically, we compare two asphaltum hafting techniques drawn from archaeological and ethnohistoric accounts from the Central Valley of California with a more stereotypical cross-hatched sinew hafting system. Our results suggest a small yet statistically significant increase in durability among asphaltum hafted points, opening the door to future research on these ethnohistorically documented hafting techniques.  相似文献   
105.
The remains of shellfish dominate many coastal archaeological sites in the Pacific and provide a wealth of information about economy, culture, environment and climate. Shells are therefore the logical sample type to develop local and regional radiocarbon chronologies. The calibration of radiocarbon (14C) dates on marine animals is not straightforward, however, requiring an understanding of habitat and dietary preferences as well as detailed knowledge of local ocean conditions. The most complex situations occur where terrestrial influences impinge on the marine environment resulting in both the enrichment and depletion of 14C (Ulm Geoarchaeology 17(4):319–348, 2002; Petchey and Clark Quat Geochronol 6:539–549, 2011). A sampling protocol that combines a high-resolution excavation methodology, selection of short-lived samples identified to species level, and a tri-isotope approach using 14C, δ13C and δ18O, has given us the ability to identify 14C source variation that would otherwise have been obscured. Here, we present new research that details high-resolution mapping of marine 14C reservoir variation between Gafrarium tumidum, Gafrarium pectinatum, Anadara granosa, Anadara antiquata, Batissa violacea, Polymesoda erosa and Echinoidea from the Bogi 1 archaeological site, Caution Bay, southern coastal Papua New Guinea. These isotopes highlight specific dietary, habitat and behavioural variations that are key to obtaining chronological information from shell radiocarbon determinations.  相似文献   
106.
107.
Ireland, located on the north‐west periphery of Europe, illustrates all the difficulties of a small, marginal, island economy. It is an ancient landscape rich in heritage and cultural features. Tourism is now a vital part of the Irish economy and recent research has demonstrated that ‘Irishness’. whilst difficult to define, is the major appeal to overseas visitors. In 1989 the Irish Government challenged Bord Failte (the Irish Tourist Board) to double revenue from overseas tourists and create 25,000 new jobs. Heritage attractions formed a fundamental feature of Bord Failte's Framework Plan for Tourism. The methodology adopted for the development and interpretation of heritage attractions is evaluated in this paper, together with an assessment of the outcomes of the strategy. This particular initiative is discussed in the context of sustainable tourism strategies.  相似文献   
108.
109.
110.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号